Blue spots on Jupiter ?

Hello,

Saturday night, I took a picture of Jupiter, low turbulence but poor seeing.
The result is here http://images.ciel.free.fr/test/jupiter_10_04_04.jpg
You can clearly see blueish spots near one of the equatorial belt.
Is this color normal for Jupiter, or is there a problem with image
processing ?

The general color of the planet seems to fit with what I saw in the
eyepiece, so I think that the white balance is not so bad.

--
Norbert. (no X for the answer)
======================================
knowing the universe - stellar and galaxies evolution
http://nrumiano.free.fr
images of the sky http://images.ciel.free.fr
======================================